I have, and I am. If I write some code, and Microsoft takes it and improves Windows, I've just helped a zillion people, regardless of how much I dislike Microsoft, and regardless of the fact that I won't see a dime or any credit.

I do think the opposing position has merit, I just don't take the same position personally.

The reason I mentioned a GPL project specifically is that that would be competing directly with the BSD project for the hearts and minds of the open source community. For some people I think that would be harder to swallow than say Microsoft using the code in Windows.